Question 1

What is a Delaunay diagram (Delaunay triangulation)?

Accepted Answer

A Delaunay diagram (Delaunay triangulation) is a set of points on a plane divided into triangles that do not overlap one another. In doing so, it satisfies the "Delaunay condition", in which the circumscribed circle of any triangle contains no points other than that triangle's vertices. It is the dual of the Voronoi diagram and is applied in various fields such as nearest-neighbor searches and terrain modeling.

Question 2

How do I enter data for the Delaunay diagram?

Accepted Answer

Enter the coordinates of the points in the text area inside the "Data Input" card. Data format: Enter the coordinates of one point per line in the form x,y. You can separate them with a comma, space, tab, etc. Example: 10,20 50,60 30 80 Re-parse: After editing the data, press the "Re-parse" button to reflect it in the chart.

Question 3

What can I set in the Delaunay diagram options?

Accepted Answer

In the "Display Settings" section, you can adjust the following items. Show/hide links: Toggle the display of the lines that make up the triangles. Show/hide points: Toggle the display of each vertex. Link width and color: Change the thickness and color of the lines. Point size and color: Change the size and color of the vertices.

Question 4

Can I manually set the min/max domain of the XY axes?

Accepted Answer

Yes, you can. If you uncheck "Auto-set the min/max domain of the XY axes" in the display settings, you will be able to manually enter the minimum and maximum values for the X and Y axes.

Question 5

What else is a Delaunay diagram called?

Accepted Answer

A Delaunay diagram is also called a "Delaunay Triangulation" in English. The name comes from the mathematician Boris Delaunay. "Delaunay diagram" and "Delaunay triangulation" both refer to the same thing.

Question 6

How can I save the chart as an image?

Accepted Answer

Click the "Download Image" button below the preview area to download your chart in PNG/JPEG/SVG format with your chosen quality. If you want to change the aspect ratio, drag the handle at the bottom-right corner of the preview frame to adjust it.

Question 7

Is there an auto-save feature?

Accepted Answer

Yes, there is. Your chart data is saved automatically to your browser's local storage. When you reload the page, or close and reopen your browser, you can restore the saved data. You can also revert to the default data by pressing the reset button at the top-right of the data input area. Local storage data is saved only in your browser and is not shared with other users. If local storage is disabled in your browser settings, the auto-save feature will not work. Clearing your browser cache will also delete the saved data.

Question 8

How do I save my data temporarily?

Accepted Answer

Click the "Save & Publish Chart" button below the preview area to temporarily save your chart. You can re-edit it later using the URL and password issued when you saved it. You can also publish the chart publicly via URL.

Question 9

How do I load saved data?

Accepted Answer

You can load a chart using the "Resume from Saved Data" button. When loading, enter the URL and password issued when you saved it.

Question 10

Can I bulk-enter data via CSV or copy & paste?

Accepted Answer

Open the dialog from the "Bulk Input" button, then copy and paste from a spreadsheet/Excel or an HTML table, or select a CSV file. Please check the screen for what to enter in each row and column. After pasting, edit it in the preview and click "Confirm & Apply" to reflect it in the chart.

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Free Delaunay Diagram Maker

Preview

Data Input

Settings & Style

Display settings

Frequently Asked Questions

Q.What is a Delaunay diagram (Delaunay triangulation)?

Q.How do I enter data for the Delaunay diagram?

Q.What can I set in the Delaunay diagram options?

Q.Can I manually set the min/max domain of the XY axes?

Q.What else is a Delaunay diagram called?

Q.How can I save the chart as an image?

Q.Is there an auto-save feature?

Q.How do I save my data temporarily?

Q.How do I load saved data?

Q.Can I bulk-enter data via CSV or copy & paste?